WO2019221395A1 - 배터리 팩 - Google Patents

배터리 팩 Download PDF

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Publication number
WO2019221395A1
WO2019221395A1 PCT/KR2019/004406 KR2019004406W WO2019221395A1 WO 2019221395 A1 WO2019221395 A1 WO 2019221395A1 KR 2019004406 W KR2019004406 W KR 2019004406W WO 2019221395 A1 WO2019221395 A1 WO 2019221395A1
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WO
WIPO (PCT)
Prior art keywords
tab
circuit board
solder
width
hole
Prior art date
Application number
PCT/KR2019/004406
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
박상훈
Original Assignee
삼성에스디아이주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성에스디아이주식회사 filed Critical 삼성에스디아이주식회사
Priority to CN201980029323.4A priority Critical patent/CN112042043A/zh
Publication of WO2019221395A1 publication Critical patent/WO2019221395A1/ko

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack.
  • a secondary battery is a battery that can be charged and discharged, unlike a primary battery that is not rechargeable.
  • Secondary batteries are used as energy sources for mobile devices, electric vehicles, hybrid cars, electric bicycles, uninterruptible power supplies, etc., and may also be used in the form of a single battery, depending on the type of external devices. It is also used in the form of a module that connects the batteries of the unit into a unit.
  • a small mobile device such as a mobile phone can operate for a predetermined time with the output and capacity of a single battery.
  • the module type including the battery is preferred, and the output voltage or the output current can be increased according to the number of built-in batteries.
  • One embodiment of the present invention includes a battery pack capable of preventing the outflow of solder, which forms a connection between the battery cell and the circuit board, and preventing an electrical short circuit due to the outflow of the solder or the scattering of the solder.
  • One embodiment of the present invention includes a battery pack in which a circuit board connected to a battery cell can be stably supported, and the connection between the battery pack and the circuit board can be maintained with high reliability.
  • the battery pack of the present invention In order to solve the above problems and other problems, the battery pack of the present invention,
  • a connection tab for mediating an electrical connection between the battery cell and the circuit board
  • connection tab The connection tab
  • a coupling part that is bent from the extension part and fitted into the tab hole of the circuit board
  • solder stopper extending in a direction opposite to the battery cell from the tab hole of the circuit board along an extension direction of the connection tab.
  • the width of the tab hole is formed larger than the width of the coupling portion
  • the solder stopper may extend across a gap between the width of the coupling portion and the width of the tab hole.
  • solder stopper may extend across the edge of the tab hole beyond the width of the joining portion.
  • extension portion and the solder stopper form a plate member extending onto a plate on one plane
  • the coupling part may be bent from the plate member and fitted into a tab hole of the circuit board.
  • the plate member may be formed with a cutout corresponding to a blank of the bent coupling portion.
  • the width of the cutout portion may be greater than the width of the coupling portion along the width direction of the tab hole.
  • solder stopper may be formed as a part of the plate member except for the cutout part of the plate member extending in the opposite direction to the battery cell from the tab hole along the extending direction of the connection tab.
  • the solder stopper may include a side portion formed on any one side of the cutout portion.
  • the cutout may be formed to be open toward the outside.
  • the solder stopper may include a pair of side portions formed on both sides of the cutout portion.
  • the cutout may be formed to be open toward the outside.
  • solder stopper For example, the solder stopper, the solder stopper, the solder stopper, the solder stopper, the solder stopper, and
  • connection tab may include; the end portion connecting the pair of the side portion in the end portion of the connection tab in the extending direction of the connection tab.
  • the cutout may be formed in a hole shape isolated from the outside.
  • the plate member is disposed on the lower surface of the circuit board
  • the coupling part may be bent from the plate member and fitted into a tab hole of the circuit board to be exposed to an upper surface of the circuit board.
  • the extension part and the solder stopper formed on opposite sides of the tab hole may contact the lower surface of the circuit board.
  • extensions and solder stoppers formed on opposite sides of the tab hole may be formed to have substantially the same thickness.
  • the solder forming the electrical connection between the connection tab and the circuit board is prevented from leaking to a place outside the connection position, the outflow of solder and solder It is possible to prevent the occurrence of an electrical short due to scattering or the like.
  • the bending structure of the connection tab bent to be coupled to the circuit board can be maintained with high reliability despite the spring back, the stable support for the circuit board is made, the workability of the process on the circuit board Can be improved.
  • FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention.
  • FIG. 2 and 3 show a perspective view and an exploded perspective view of a portion of the battery pack shown in FIG. 1, respectively.
  • FIG. 4 and 5 are enlarged views of a part of the battery pack shown in FIG. 2, showing a perspective view and an exploded perspective view, respectively.
  • FIG. 6 is a view showing a part of the battery pack shown in FIG. 4 in the VI direction.
  • FIG. 7 is a view of a portion of the battery pack shown in FIG. 4 viewed in the VII direction.
  • FIG. 8 is a view for explaining the structure of the first connection tab applicable to the comparative example in contrast to the present invention.
  • FIG. 9 is a view showing the first connecting tab shown in FIG. 8 in the IX direction.
  • FIG. 10 is an exploded perspective view for explaining a modified embodiment of the first connecting tab shown in FIG. 5.
  • FIG. 11 is an exploded perspective view of a portion of the battery pack shown in FIG. 3.
  • connection tab 12 shows a connection tab applicable to another embodiment of the present invention.
  • the battery pack of the present invention In order to solve the above problems and other problems, the battery pack of the present invention,
  • a connection tab for mediating an electrical connection between the battery cell and the circuit board
  • connection tab The connection tab
  • a coupling part that is bent from the extension part and fitted into the tab hole of the circuit board
  • solder stopper extending in a direction opposite to the battery cell from the tab hole of the circuit board along an extension direction of the connection tab.
  • FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention.
  • 2 and 3 show a perspective view and an exploded perspective view of a portion of the battery pack shown in FIG. 1, respectively.
  • the battery pack of the present invention the battery cell 100, the protection circuit module 200 for controlling the charging and discharging operation of the battery cell 100 is electrically connected to the battery cell 100 It may include.
  • the battery pack includes first and second covers 310 and 320 covering opposite ends of the battery cell 100 and the protection circuit module 200, and the first and second covers 310 and 320, respectively.
  • the first and second insulating sheets 330 and 340 may surround the outer circumference of the exposed battery cell 100.
  • the battery cells 100 may be provided, two or more battery cells 100 may be electrically connected to each other through the protection circuit module 200.
  • the protection circuit module 200 may include a conductive pattern (not shown) for providing a charge and discharge path electrically connected to each battery cell 100 and connected to each battery cell 100. It may include. More specifically, the protection circuit module 200 may include a circuit board 250 and a conductive pattern (not shown) formed on the circuit board 250, and are mounted on the circuit board 250. It may include the circuit elements of.
  • the protection circuit module 200 may extend in a direction crossing the plurality of battery cells 100 to form an electrical connection with each of the battery cells 100.
  • the protection circuit module 200 may extend across the plurality of battery cells 100 to form an electrical connection with each connection tab 120, 120 ′ drawn out from the battery cell 100.
  • the charge and discharge currents from the connection tabs 120 and 120 ′ may be collected and transferred to an external circuit (not shown).
  • the connection tabs 120 and 120 ′ may include first and second connection tabs 120 and 120 ′ drawn from different polarities of the battery cells.
  • the first and second connection tabs 120 and 120 ′ may include positive electrode plates (not shown) having different polarities among electrode assemblies (not shown) accommodated in the respective battery cells 100.
  • Each of the cathode electrode plates (not shown) may be electrically connected to each other.
  • first and second connection tabs 120 and 120 ′ may be formed in different structures.
  • first connection tab 120 will be described below, and the second connection tabs will be described below.
  • the structure of 120 ′ will be mainly described for differences from the first connection tab 120, and redundant descriptions of technical features shared with the first connection tab 120 will be omitted.
  • the first and second connection tabs 120 and 120 ′ may be formed in the same structure, for example, the structure of the first connection tab 120 to be described below, May be selectively applied to any one of the first and second connection tabs 120 and 120 ⁇ having different polarities or may be applied to both the first and second connection tabs 120 and 120 ⁇ having different polarities, and similarly,
  • the structure of the second connection tabs 120 ′ described below may be selectively applied to any one of the first and second connection tabs 120 and 120 ′ having different polarities, or may have a first and second polarities. 2 may be applied to both the connection tabs 120 and 120 '.
  • the first and second connection tabs 120 and 120 ′ both mediate electrical connection between the battery cell 100 and the protection circuit module 200.
  • the structure of the first and second connection tabs 120 and 120 ′ does not need to be differentiated.
  • FIG. 4 and 5 are enlarged views of a part of the battery pack shown in FIG. 2, showing a perspective view and an exploded perspective view, respectively.
  • FIG. 6 is a view showing a part of the battery pack shown in FIG. 4 in the VI direction.
  • the first connection tab 120 may mediate an electrical connection between the battery cell 100 and the protection circuit module 200. More specifically, the first connection tab 120 may mediate electrical connection between the battery cell 100 and the circuit board 250 of the protection circuit module 200, and the first connection tab 120. ) May be inserted into the tap hole 250 ′ of the circuit board 250 to be electrically connected to the circuit board 250 or the protection circuit module 200.
  • the first connection tab 120 may extend integrally from the battery cell 100, and may be electrically connected to an electrode assembly (not shown) inside the battery cell 100 to fill the battery cell 100. A discharge path can be formed. Although not shown in the drawings, the first connection tab 120 does not extend integrally from the battery cell 100, but is limited to a connection between the battery cell 100 and the circuit board 250. An electrode tab (not shown) extending from the (100), and a connection member (not shown) conductively connected to the electrode tab (not shown) separately from the electrode tab (not shown), may include a first The connection tab 120 may also form a charge and discharge path of the battery cell 100.
  • the first connection tab 120 extends from the battery cell 100 to be fitted into the tab hole 250 ′ of the circuit board 250, and is inserted into the tab hole 250 ′ in a high temperature thermal process such as soldering.
  • the molten solder (not shown) may penetrate between the first connection tab 120 and the circuit board 250 to electrically connect the first connection tab 120 and the circuit board 250 to each other.
  • the solder (not shown) may protrude onto the circuit board 250 along the first connection tab 120 fitted in the tab hole 250 ′ at the position of the tab hole 250 ′ to form a predetermined height.
  • the first connection tab 120 and the circuit board 250 may be coupled to each other.
  • the first connection tab 120 may be fitted to protrude from the lower surface of the circuit board 250 to the upper surface, and the electrode pad 251 around the tap hole 250 ′ of the circuit board 250. ), The electrode pad 251 and the first connection tab 120 may be electrically connected to each other by solder solidified by a high temperature thermal process.
  • the electrode pad 251 formed along the tab hole 250 ′ of the circuit board 250 may be formed as part of a conductive pattern (not shown) formed on the circuit board 250, and may be a circuit board. Charge and discharge currents of the battery cell 100 may be communicated through the conductive pattern 250 (not shown).
  • the first connection tab 120 includes an extension 121 between the battery cell 100 and the tap hole 250 ′ along the extension direction of the first connection tab 120, and a tap hole 250 ′. And a solder stopper 123 extending from the tab hole 250 ′ in the opposite direction to the battery cell 100.
  • the extension part 121 may be formed between the battery cell 100 and the tab hole 250 ′ along the extension direction of the first connection tab 120.
  • the coupling part 122 is formed to be bent from the extension part 121 so as to fit in the tab hole 250 ′, and is fitted into the tab hole 250 ′ to form an electrical connection with the circuit board 250. Can be.
  • the solder stopper 123 extends across the periphery of the tab hole 250 ′, blocks a gap between the coupling part 122 and the tab hole 250 ′, and melts to the bottom surface of the circuit board 250. Solder (not shown) can be prevented from leaking.
  • the coupling part 122 may be fitted into the tab hole 250 ′, and a predetermined clearance may be formed between the coupling part 122 and the tab hole 250 ′.
  • the width W1 of the coupling part 122 may be formed to be narrower than the width W2 of the tab hole 250 ′ (W1 ⁇ W2), and thus, the width of the coupling part 122 is provided.
  • the molten solder (not shown) may leak from an edge gap of the tab hole 250 ′ that is outside of W1.
  • the solder stopper 123 is formed at a position outside the width W1 of the coupling portion 122 and is melted through a gap of the tab hole 250 ′ at a position outside the width W1 of the coupling portion 122. It is possible to block the leakage of the solder (not shown). More specific technical details regarding the solder stopper 123 will be described later in more detail.
  • the extension part 121 and the solder stopper 123 may form one plate member 120a extending on a plate so as to form the same plane, and the coupling part 122 may be connected to the extension part 121.
  • the solder stopper 123 may be bent from the plate member 120a formed to be inserted into the tab hole 250 ′ so as to protrude from the lower surface of the circuit board 250 to the upper surface.
  • the plate member 120a may be disposed on the bottom surface of the circuit board 250, and the coupling part 122 bent from the plate member 120a may be disposed on the circuit board 250 from the bottom surface of the circuit board 250.
  • the tap hole 250 ′ may be exposed to the upper surface of the circuit board 250.
  • the extension part 121 and the solder stopper 123 may be disposed on a bottom surface of the circuit board 250, and the coupling part 122 may be formed by the extension part 121 and the solder stopper 123. It may be bent from the member 120a and fitted into the tab hole 250 ′ and may be exposed to the upper surface of the circuit board 250 through the tab hole 250 ′.
  • the plate member 120a of the first connection tab 120 may be formed with a cutout C present as an empty space according to the bending of the coupling portion 122.
  • the cutout C may correspond to a space of the coupling part 122 bent from the plate member 120a, and the cutout C and the coupling part 122 may have the same width. However, if the cutout portion C and the coupling portion 122 are formed to have the same width, the solder stopper 123 and the coupling portion 122 formed of the plate member 120a except for the cutout portion C are formed.
  • Physical interference may occur, and especially when the coupling portion 122 is bent, physical interference between the coupling portion 122 and the solder stopper 123 may be caused, so that the width of the cutout C Wc is formed larger than the width W1 of the coupling portion 122 to prevent physical interference between the solder stopper 123 and the coupling portion 122 outside the width Wc of the cutout C.
  • An extension 121 and a solder stopper 123 may be formed in front and rear of the tab hole 250 ′ along the extending direction of the plate member 120a or the first connection tab 120, respectively. More specifically, an extension 121 may be formed between the battery cell 100 and the tab hole 250 ′ along the extending direction of the plate member 120a or the first connection tab 120, and may include a tab hole ( A solder stopper 123 may be formed in a direction opposite to the battery cell 100 from 250 ′. In this case, the solder stopper 123 may correspond to a portion of the plate member 120a extending from the tab hole 250 ′ in the opposite direction of the battery cell 100 except for the cutout portion C. FIG.
  • solder stopper 123 since the solder stopper 123 is configured to block the edge gap of the tab hole 250 ′, an empty space such as the cutout C is not applicable, and the plate member 120a except the cutout C is not applicable. It can be formed as a part of).
  • the solder stopper 123 may be formed as a part of the plate member 120a except for the cutout C, and may be formed as a plate member 120a outside the width Wc of the cutout C.
  • the solder stopper 123 may block a gap between the width W1 of the coupling part 122 and the width W2 of the tab hole 250 ′ at a position outside the width Wc of the cutout C. have.
  • the width W1 of the coupling portion 122 may be measured in the same direction as the width W2 of the tab hole 250 ⁇ , and the tab hole 250 ⁇ extends along the width direction. It may be formed in the form.
  • the width W2 of the tab hole 250 ′ and the width W1 of the coupling part 122 may have a tolerance to allow the fitting coupling.
  • the solder stopper 123 may extend across the edge of the tab hole 250 ′ so as to block a gap of the tab hole 250 ′, and the solder stopper 123 may be a tab hole 250 ′.
  • the gap between the width (W2) and the width (W1) of the coupling portion 122 can be blocked. For example, if an empty space exists between the width W2 of the tap hole 250 ⁇ and the width W1 of the coupling portion 122 along the width W2 direction of the tap hole 250 ⁇ , The molten solder (not shown) may flow out to the bottom surface of the circuit board 250 through the empty space.
  • the width Wc of the cutout portion C may be combined. It may be formed to be substantially the same as the width (W1) of the portion (122).
  • the physical interference between the coupling portion 122 and the plate member 120a, more specifically the solder stopper 123 is reduced.
  • the width Wc of the cutout portion C may be larger than the width W1 of the coupling portion 122, and thus, the position that does not directly contact the width W1 of the coupling portion 122, that is,
  • the solder stopper 123 may be formed at a position spaced apart from the width W1 of the coupling portion 122 by a predetermined clearance. Since the solder stopper 123 is formed at a position outside the width Wc of the cutout C, the solder stopper 123 and the coupling part 122 are formed by widening the width Wc of the cutout C. You can leave a margin of clearance between).
  • the solder stopper 123 may extend from the tab hole 250 ′ in the opposite direction to the battery cell 100 along the extension direction of the first connection tab 120, and may have an edge of the tab hole 250 ′. It extends across and can block the gap of the tab hole 250 ⁇ .
  • a molten solder (not shown) filled in the tab hole 250 ′ in the soldering process may be formed through a gap between the coupling part 122 and the tab hole 250 ′. It may serve to block the flow of molten solder (not shown) so as not to penetrate the lower surface of the substrate 250.
  • the solder stopper 123 blocks the flow of solder (not shown) to prevent the molten solder (not shown) from flowing out to the lower surface of the circuit board 250, thereby melting the solder (melted on the upper surface side of the circuit board 250). Not shown) may form a sufficient height to form a rigid coupling between the coupling portion 122 and the circuit board 250.
  • the tap hole 250 ′ is not occupied by the coupling part 122.
  • the flatness of the circuit board 250 becomes poor due to the influence of solder balls (not shown) solidified on the lower surface of the circuit board 250.
  • 250 is not stably supported, and the workability of the process performed on the circuit board 250 is inferior.
  • the tab hole 250' may be moved out of the tab hole 250 'to another area of the circuit board 250.
  • Flowing causes an electrical short circuit between the conductive patterns (not shown) or circuit elements formed on the circuit board 250, and due to the scattering of molten solder (not shown), a large number onto the circuit board 250 is generated.
  • Solder balls (not shown) may scatter and cause electrical shorts.
  • the gap of the tab hole 250 'across the edge of the tab hole 250' is connected to the first connection tab 120 through the electrical connection between the battery cell 100 and the circuit board 250.
  • a solder stopper 123 for blocking the melted the molten solder (not shown) filled in the tap hole 250 ⁇ flows out to the lower surface of the circuit board 250, the flatness of the circuit board 250 is lowered, Solder balls (not shown) scattered onto the 250 can prevent electrical shorts from being caused.
  • the solder stopper 123 may serve to block the outflow of the molten solder (not shown) through the edge gap of the tab hole 250 ′, and to support the circuit board 250 in a balanced manner. By supporting the circuit board 250 in a balanced manner, the bent shape of the coupling part 122 can be stably maintained. This will be described in more detail below.
  • FIG. 7 is a view of a portion of the battery pack shown in FIG. 4 viewed in the VII direction.
  • the solder stopper 123 is formed on the opposite side of the extension portion 121 with respect to the tab hole 250 ⁇ , the solder stopper The 123 and the extension 121 may support the circuit board 250 in a balanced manner on opposite sides of the tab hole 250 ′, and stabilize the circuit board 250 with respect to the bottom surface (not shown). Can be supported.
  • the plate member 120a formed by the extension 121 and the solder stopper 123 is disposed on the bottom surface of the circuit board 250 and has a uniform thickness t and a bottom surface (not shown). ) And the circuit board 250 can stably support the circuit board 250.
  • the extension part 121 and the solder stopper 123 disposed opposite to each other based on the tab hole 250 ′ in which the coupling part 122 is inserted may stably support the bending of the coupling part 122.
  • the coupling part 122 is bent from the plate member 120a formed by the extension part 121 and the solder stopper 123 and fitted into the tab hole 250, and the coupling part 122 is bent.
  • the formed shape has an extension 121 and a solder stopper formed on opposite sides of the plate member 120a in spite of the spring back tending to return to the cutout C of the plate member 120a. 123) can be stably maintained.
  • the plate member 120a may maintain a flat posture parallel to the circuit board 250 at the bottom surface of the circuit board 250, and may be bent from the plate member 120a and fitted into the tab hole 250.
  • the form bent by the side wall of the tab hole 250 may be forced to the 122. That is, the relative bending between the plate member 120a and the coupling portion 122 is overlapped with the circuit board 250 and disposed in parallel with the tab member 120a and the tab hole 250 ′ of the circuit board 250.
  • the plate member 120a is formed on the lower surface of the circuit board 250 by the extended portion 121 and the solder stopper 123 formed on opposite sides of the plate member 120a.
  • the contact portion may maintain a flat posture parallel to the circuit board 250, and the coupling portion 122 fitted into the tab hole 250 ′ may maintain a shape bent from the plate member 120a. Accordingly, the electrical connection between the battery cell 100 and the circuit board 250 connected to each other through the coupling portion 122 can be maintained with high reliability.
  • FIG. 8 is a view for explaining the structure of the first connection tab applicable to the comparative example in contrast to the present invention.
  • FIG. 9 is a view showing the first connecting tab shown in FIG. 8 in the IX direction.
  • the first connection tab 20 may include an extension 21 extending from the battery cell 10 and a tab hole 25 ′ of the circuit board 25 bent from the extension 21. It may include a coupling portion 22 fitted in.
  • the extension part 21 is formed on the other hand based on the tab hole 25 ′ along the extension direction of the first connection tab 20.
  • the structure corresponding to the extension part 21 is not provided in the opposite side to the extension part 21, the circuit board 25 is supported in the inclined state to one side or the support state is unstable. Workability of the process performed on the circuit board 25 is inferior, such as being unstable in any one posture and causing continuous shaking.
  • the coupling portion 22 of the first connection tab 20 is fitted into the tab hole 25 ′ of the circuit board 25, and the coupling portion 22 is bent from the extension portion 21 to form a tap hole ( 25 '), the bent shape of the engaging portion 22 is difficult to remain stable under the influence of the spring back of the tendency to return to a flat position. That is, the extension part 21 is formed on one side with respect to the tap hole 25 ′ of the circuit board 25, but is balanced to correspond to the extension part 21 on the opposite side of the extension part 21.
  • the solder stopper 123 may be balanced with the opposite extension 121 relative to the tab hole 250 ′, for example, the solder stopper.
  • the 123 and the extension part 121 are part of the plate member 120a having the same thickness t, and may keep the circuit board 250 in a balanced state on the opposite side. Accordingly, the circuit board 250 may be maintained in a stable state, and workability of a process performed on the circuit board 25 may be improved.
  • a plate member including a solder stopper 123 and an extension 121 formed on opposite sides of the tab hole 250 ′ of the circuit board 250 120a may support the plate member 120a on the lower surface of the circuit board 250 in a balanced manner and may contact the circuit board 250 with a sufficient area to maintain a flat posture parallel to the circuit board 250.
  • the engaging portion 122 bent from the plate member 120a is inserted into the tab hole 250 'in spite of the spring back which tends to return to the cutout C of the plate member 120a. The shape bent from the member 120a can be maintained.
  • the solder stopper 123 may be formed to surround the cutout (C). That is, the solder stopper 123 is formed as a part of the plate member 120a excluding the cutout C from the plate member 120a extending from the tab hole 250 ′ in the opposite direction to the battery cell 100. In one embodiment of the present invention, the solder stopper 123 is a pair of side portions 123a formed on both sides along the width Wc direction of the cutout portion C, and side portions of the paired sides. It may include an end portion 123b connecting the 123a.
  • the end portion 123b of the solder stopper 123 may correspond to the end portion of the first connection tab 120 in the extending direction of the first connection tab 120,
  • the circuit board 250 may be stably supported at the position furthest from the battery cell 100 along the extending direction.
  • the end portion 123b of the solder stopper 123 may reinforce the rigidity of the solder stopper 123 by connecting the side portions 123a to each other.
  • the solder stopper 123 is formed of a part of the plate member 120a excluding the cutout C, from a part of the plate member 120a extending from the tab hole 250 ′ in the opposite direction to the battery cell 100.
  • the cutout C surrounded by the solder stopper 123 may include a pair of sides 123a and a termination 123b connecting the pair of sides 123a to form a closed hole or isolated from the outside. It may be formed in the form of a hole.
  • FIG. 10 is an exploded perspective view for explaining a modified embodiment of the first connecting tab shown in FIG. 5.
  • the first connection tab 220 includes a plate member 220a including an extension 221 and a solder stopper 223 formed on opposite sides of the tab hole 250 ′, and
  • the coupling member 222 may be bent from the plate member 220a and fitted into the tab hole 250 ′.
  • the solder stopper 223 may block a gap between the width W1 of the coupling portion 222 and the width W2 of the tab hole 250 ′, and the width W1 and the tab of the coupling portion 222. It may extend across the gap between the width (W2) of the hole (250 ').
  • the plate member 220a may be formed with a cutout portion C corresponding to a space of the coupling portion 222 bent from the plate member 220a, and the cutout portion C may be a space of the coupling portion 222.
  • the width Wc of the cutout C may be formed to be substantially the same as the width W1 of the coupling part 222.
  • the solder stopper 223 is located at a position outside the width W1 of the cutout portion C or the width W1 of the coupling portion 122 that is the same as the width Wc of the cutout portion C. , And may extend across the gap between the width W1 of the coupling portion 222 and the width W2 of the tab hole 250 ′. In this embodiment, the solder stopper 223 is in contact with the width W1 of the cutout C, or the width W1 of the engaging portion 222 equal to the width Wc of the cutout C. By blocking the gap between the width W1 of the coupling portion 222 and the width W2 of the tab hole 250 ′, the solder (not shown) melted in the high temperature thermal process is applied to the circuit board 250. It can effectively prevent the leakage to the lower surface.
  • both the first and second connection tabs 120 and 120 ′ mediate electrical connection between the battery cell 100 and the circuit board 250.
  • the technical features may be shared with the first connection tab 120.
  • the structure of the second connection tab 120 ′ will be described, but the differences from the first connection tab 120 will be mainly described, and overlapping technical features shared with the first connection tab 120 will be described. The description will be omitted.
  • FIG. 11 is an exploded perspective view of a portion of the battery pack shown in FIG. 3.
  • the second connection tab 120 ′ may extend from the battery cell 100 to be inserted into the tap hole 250 ′ of the circuit board 250, and the battery cell 100 and the circuit board may be inserted into the tab hole 250 ′. Charge and discharge paths may be formed between the 250.
  • the second connection tab 120 ′ includes an extension 121 ′ formed between the battery cell 100 and the tab hole 250 ′ along the extension direction of the second connection tab 120 ′, and the extension.
  • a coupling portion 122 ' that is bent from the portion 121' and fitted into the tab hole 250 'of the circuit board 250, and a solder extending from the tab hole 250' in the opposite direction to the battery cell 100; It may include a stopper (123 ⁇ ).
  • the solder stopper 123 ′ cuts the gap of the tab hole 250 ′ at a position outside the width of the cutout C, such that the molten solder (not shown) is formed on the bottom surface of the circuit board 250. To prevent spills.
  • the solder stopper 123 ′ is a plate member 120 ′ excluding a cutout C from a part of the plate member 120 ′ extending from the tab hole 250 ′ in a direction opposite to the battery cell 100.
  • the solder stopper 123 ′ may include a pair of side portions 123 ′ a formed at both sides of the cutout C.
  • the pair of side portions 123'a of the solder stopper 123 ' blocks a gap between the protrusion 122' and the tab hole 250 'to prevent the flow of molten solder (not shown). You can block.
  • the second connection tab 120 ′ may include paired sides 123 ′ a on both sides of the cutout C. Unlike the first connection tab 120 shown in FIG. The end portion 123b formed at the end portion of the connection tab 120 and connecting the pair of side portions 123a may not be included. That is, in the second connection tab 120 ′, the pair of side portions 123 ′ of the solder stopper 123 ′ may be formed to be spaced apart from each other at the end of the second connection tab 120 ′.
  • the cutout C of the second connection tab 120 ′ may be formed to be open toward the outside.
  • the cutout C of the second connection tab 120 ′ may correspond to a gap of the bent coupling portion 122 ′, and the cutout portion elongated to the end of the second connection tab 120 ′ ( C) may mean that the coupling part 122 ′ is formed to be extended to the end of the second connection tab 120 ′.
  • the coupling portion 122 ′ inserted into the tab hole 250 ′ is formed to have a sufficient length so that the coupling force with the circuit board 250 may be improved.
  • connection tab 12 shows a connection tab applicable to another embodiment of the present invention.
  • connection tab 120 ′′ electrically connects the battery cell 100 and the circuit board 250 to each other.
  • the connection tab 120 ′′ may be connected to the connection tab 120 ′′.
  • An extension 121 ′′ formed between the battery cell 100 and the tab hole 250 ′ of the circuit board 250 along the extension direction of the battery cell 100 and the tab hole 250 ′, and the tab hole ( And a solder stopper 123 ′′ extending in a direction opposite to the battery cell 100 from the tab hole 250 ′.
  • the extension 121 ′′ and the solder stopper 123 ′′ may form a plate member 120 ′′ a that extends on one plane, and the plate member 120 ′′ a is bent.
  • An incision C corresponding to a space of the coupling part 122 ′′ may be formed.
  • the solder stopper 123 ′′ may be a plate member extending from the tab hole 250 ′ in the opposite direction of the battery cell 100 along the extending direction of the plate member 120 ⁇ a or the connecting tab 120 ′′. It may be formed as a part of the plate member 120 ⁇ a except for the cutout portion C of the part of the 120 ⁇ a).
  • the solder stopper 123 ′′ may include one side portion 123 ′′ a formed on one side of the cutout C.
  • the side portion 123 ′′ a extends across the edge of the tab hole 250 ′′ and the molten solder (not shown) passes through the edge of the tab hole 250 ′′ to the bottom surface of the circuit board 250. You can prevent spills.
  • the solder stopper 123 ′′ does not include a pair of sides formed on both sides of the cutout C, and is cut out. It may include only one side portion 123 ⁇ a formed on any one side of the portion (C). Accordingly, the cutout C of the connection tab 120 ′′ may be formed to be open toward the outside.
  • connection tab 120 ′′ may correspond to a space of the bent coupling portion 122 ′′, and the cutout portion C extended widely in the width direction of the connection tab 120 ′′.
  • the coupling portion 122 ′′ is formed to be wide in the width direction of the connection tab 120 ′′.
  • the coupling portion 122 ′′ inserted into the tab hole 250 ′ is formed to have a sufficient width so that the coupling force with the circuit board 250 may be improved.
  • connection tab 120 ′′ described with reference to FIG. 12 may be applied to any one connection tab selected from the first and second connection tabs 120 and 120 ′ of the present invention.
  • the two connection tabs 120 and 120 ' may be applied to both.
  • the present invention can be applied to a battery pack as an energy source capable of charging and discharging.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/KR2019/004406 2018-05-15 2019-04-12 배터리 팩 WO2019221395A1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980029323.4A CN112042043A (zh) 2018-05-15 2019-04-12 电池组

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KR1020180055657A KR102591517B1 (ko) 2018-05-15 2018-05-15 배터리 팩

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KR101023873B1 (ko) * 2008-12-23 2011-03-22 삼성에스디아이 주식회사 보호회로모듈을 구비하는 이차 전지 및 그 제조방법
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